Since the BB bearing deteriorated, I'd like to try a non-contact bearing that is light in rotation and ordered for replacement. The size could be installed without problems.
I felt a light feeling when turning the bearing by hand.
I attached a crank and tried it but I feel good and the crank is smooth.
It seems that the exchange frequency will be faster than usual, but if you exchange it yourself, the cost can be suppressed.

I bought both sides contact of Osaka soul and non-contact on both sides at the same time, but noncontacter was heavier rotation and accuracy became uneasy, so I bought NTN again. It was just "loss of money buying".

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All of the products MonotaRO Singapore offers are subject to Japanese local laws, regulations, and certification standards.
Please make sure that it may or may not meet requirements of your country and/or international organizations,
including but not limited to, UL Certification, China Compulsory Certificate system, and Halal.
MonotaRO Co.,Ltd. Hyogo Public Safety Commission No.631330800020